What is wrong with my tongue?

In March, I developed a white cut or sore on the right side of my tongue. This has happened before, and I umed it would simply go away after a few days. Instead, the sore remained, and I developed white ridges on both sides of my tongue. My tongue was sore and sort of stiff. I waited, but it didn't go away for several days. I called a nurse hotline twice, but they could only guess (incorrectly) what it might be. (It's clearly not oral thrush.) Of course, I researched this condition extensively on the Internet, but the thing that sounds closest to it is "hairy leukoplakia". It can't be that, however, because I don't have the ociated health care issues. The symptoms declined and almost disappeared as recently as April 20th, but now they're returning again! It's very uncomfortable and makes tasting, eating and drinking difficult. Not surprisingly citrus, coffee and wine seem to make the condition worse, but abstaining from these doesn't make it disappear. Any ideas?